...
首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >A Comparative Study of ULFWaves' Role in the Dynamics of Charged Particles in the Plasmasphere: Van Allen Probes Observation
【24h】

A Comparative Study of ULFWaves' Role in the Dynamics of Charged Particles in the Plasmasphere: Van Allen Probes Observation

机译:ULFWaves”作用的比较研究带电粒子的动力学等离子体层:范艾伦辐射探测器观察

获取原文
获取原文并翻译 | 示例
           

摘要

By analyzing observations from Van Allen Probes in its inbound and outbound orbits, we present evidence of coherent enhancement of cold plasmaspheric electrons and ions due to drift-bounce resonance with ultralow frequency (ULF) waves. From 18:00 UT on 28 May 2017 to 10:00 UT on 29 May 2017, newly formed poloidal mode standing ULF waves with significant electric field oscillations were observed in two consecutive orbits when Probe B was traveling inbound. In contrast to observations during outbound orbits, the cold (<150 eV) electrons measured by the HOPE instrument were characterized by flux enhancements several times larger and bidirectional pitch angle distributions during inbound orbits. The electron number density inferred from upper hybrid waves is twice as larger as during inbound orbits, which were also confirmed by an increase of spacecraft potential. The observed ULF waves are identified as second harmonic modes that satisfy the drift-bounce resonant condition of N = 1 with cold electrons. An enhancement of the plasmaspheric ion number density to restore charge neutrality of plasmas in inbound orbits is observed, which is associated with an increase of ULF wave periods. The observations suggest that the dynamics of plasmaspheric electrons is modified by ULF waves through drift-bounce resonance and that plasmaspheric ions are indirectly impacted.
机译:通过分析范艾伦辐射探测器的观测它的入站和出站的轨道,我们礼物相干增强冷的证据由于plasmaspheric电子和离子drift-bounce与超低频共振(ULF)波。10点UT 2017年5月29日,新形成的极向模式站ULF波显著的电在两个振荡观察连续轨道探测器B旅行时入站。出站轨道,低温(< 150 eV)电子希望测量的仪器特点是流量增强好几次了更大的和双向螺距角分布在入站轨道。从上数密度的混合波在入站两倍大的轨道,这也证实了一个增加的宇宙飞船的潜力。确定为满足二次谐波模式N = 1的drift-bounce共振条件冷电子。plasmaspheric离子数密度恢复等离子体的电中性区入站轨道观察到的,这是与增加有关ULF波周期。plasmaspheric电子的动力学修改通过drift-bounce ULF波共振,plasmaspheric离子间接的影响。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号